MESON Chess Problem Database
Problem Display
PID: 543 (b3Qbq1/6p1/p2p1PP1/Np1kB2R/1P3p2/K1R1p3/1p6/1B1r1n2 w - - 0 1)
Chandler, Guy Wills
The Observer, 1962
#2
10 + 13
SOLUTION
- SOUND
- Sets
- 1...Qe6
- 2.Qxa8#
- 1...Qf7
- 2.Qxf7#
- 1...Qh7
- 2.Qf7#
- 1...Qh8
- 2.Qf7#
- 1...Rd4
- 2.Bxf4#
- 1...Be7
- 2.Qxg8#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Bxf6#
- 1...Qe6
- Tries
- 1.Sb3?
- threat
- 2.Bd4#
- 2.Bxf4#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Bxf6#
- 1...Be7
- 2.Qxg8#
- 1...Qe6
- 2.Qxa8#
- 1...Qh7
- 2.Qf7#
- 1...Qh8
- 2.Qf7#
- 1...Rd4
- 2.Bxd4#
- 2.Bxf4#
- 1...f3
- 2.Bh2#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 1...Sg3!
- threat
- 1.Bxd6+?
- 1...Kd4
- 2.Qe5#
- 1...Kxd6!
- 1...Kd4
- 1.Rb3?
- threat
- 2.Bxb2#
- 2.Bc3#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Bxf6#
- 1...Be7
- 2.Qxg8#
- 1...Qe6
- 2.Qxa8#
- 1...Qh7
- 2.Qf7#
- 1...Qh8
- 2.Qf7#
- 1...Rd4
- 2.Bxf4#
- 1...Sg3!
- threat
- 1.Rd3+?
- 1...Rxd3+
- 2.Bc3#
- 1...Ke4!
- 1...Rxd3+
- 1.Rxe3?
- threat
- 2.Ba2#
- 2.Be4#
- 2.Bxb2#
- 2.Bc3#
- 1...Rd3+
- 2.Bc3#
- 1...Rxb1
- 2.Bxb2#
- 2.Bc3#
- 1...fxe3
- 2.Bxb2#
- 2.Bc3#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Ba2#
- 2.Be4#
- 2.Bxf6#
- 1...Be7
- 2.Ba2#
- 2.Bxb2#
- 2.Bc3#
- 2.Qxg8#
- 1...Sg3
- 2.Ba2#
- 1...Qe6
- 2.Ba2#
- 2.Be4#
- 2.Qxa8#
- 1...Qh7
- 2.Ba2#
- 2.Be4#
- 2.Qf7#
- 1...Qh8
- 2.Ba2#
- 2.Be4#
- 2.Qf7#
- 1...Rc1
- 2.Be4#
- 2.Bxb2#
- 2.Bc3#
- 1...Rd4
- 2.Bxf4#
- 1...Sd2
- 2.Bxb2#
- 2.Bc3#
- 1...Sxe3!
- threat
- 1.Rc4?
- threat
- 2.Be4#
- 2.Bxb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bxf4#
- 1...Rd3+
- 2.Bc3#
- 1...Rxb1
- 2.Bxb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bxf4#
- 2.Rd4#
- 1...bxc4
- 2.Bxb2#
- 2.Bc3#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Be4#
- 2.Bxf6#
- 1...Be7
- 2.Qxg8#
- 1...Qe6
- 2.Be4#
- 2.Qxa8#
- 1...Qh7
- 2.Be4#
- 2.Qf7#
- 1...Qh8
- 2.Be4#
- 2.Qf7#
- 1...Rd4
- 2.Bxd4#
- 2.Bxf4#
- 2.Rxd4#
- 1...Sd2
- 2.Bxb2#
- 2.Bc3#
- 2.Bd4#
- 2.Bxf4#
- 2.Rd4#
- 1...f3
- 2.Be4#
- 2.Bxb2#
- 2.Bh2#
- 2.Bc3#
- 2.Bg3#
- 2.Bd4#
- 2.Bf4#
- 1...Sg3!
- threat
- 1.Rc7?
- threat
- 2.Bxb2#
- 2.Bc3#
- 1...Rd3+
- 2.Bc3#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Bxf6#
- 1...Be7
- 2.Qxg8#
- 1...Qe6
- 2.Qxa8#
- 1...Qh7
- 2.Qf7#
- 1...Qh8
- 2.Qf7#
- 1...Rd4
- 2.Bxf4#
- 1...Sg3!
- threat
- 1.Qxb5+?
- 1...Ke6
- 2.Bf5#
- 1...axb5!
- 1...Ke6
- 1.fxg7?
- threat
- 2.Bf6#
- 1...dxe5
- 2.Qxe5#
- 1...Be7
- 2.Qxg8#
- 1...Qe6
- 2.Qxa8#
- 1...Qh7
- 2.Qf7#
- 1...Qh8
- 2.Qf7#
- 1...Sg3!
- threat
- 1.Sb3?
- Keys
- 1.Rc1!
- threat
- 2.Bxb2#
- 2.Bc3#
- 1...Rd3+
- 2.Bc3#
- 1...bxc1Q+
- 2.Bb2#
- 1...bxc1B+
- 2.Bb2#
- 1...bxc1S
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 1...bxc1R
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 1...dxe5
- 2.Qxe5#
- 1...gxf6
- 2.Bxf6#
- 1...Be7
- 2.Qxg8#
- 1...Qe6
- 2.Qxa8#
- 1...Qh7
- 2.Qf7#
- 1...Qh8
- 2.Qf7#
- 1...Rd4
- 2.Bxf4#
- 1...Sg3
- 2.Rxd1#
- threat
- 1.Rc1!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(m);SBLOCK::QAB(J),XB(k)
- Q(m);N_GUARD::QAB(J),XQ(m)
- Q(m);N_GUARD::QAB(J)
- R(a);SBLOCK::R(G)+B(F),XP(e)
- B(l);OGATE::QAB(J),XQ(m)
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- P(j);OGATE,XP(H)::R(G)+B(F),XP(j)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- P(j);OGATE,XP(H)::R(G)+B(F),XP(j)
- B(l);OGATE::QAB(J),XQ(m)
- Q(m);SBLOCK::QAB(J),XB(k)
- Q(m);N_GUARD::QAB(J)
- Refutation
- S(b);
- Try
- B(F);CHECK,XP(i)
- Vars
- K(g);P-FLIGHT::QAB1(J)
- Refutation
- K(g);P-FLIGHT,XB(F)
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- P(j);OGATE,XP(H)::R(G)+B(F),XP(j)
- B(l);OGATE::QAB(J),XQ(m)
- Q(m);SBLOCK::QAB(J),XB(k)
- Q(m);N_GUARD::QAB(J)
- R(a);SBLOCK::R(G)+B(F),XP(e)
- Refutation
- S(b);
- Try
- R(C);CHECK
- Vars
- R(a);CHECK,XR(C)::R(G)+B(F)
- Refutation
- K(g);S_FLIGHT
- Try
- R(C);XP(d)
- Threat
- DUALS(4)
- Vars
- R(a);CHECK::R(G)+B(F)
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- S(b);::B(A)
- R(a);SBLOCK::R(G)+B(F),XP(e)
- Refutation
- S(b);XR(C)
- Try
- R(C);
- Threat
- DUALS(5)
- Vars
- R(a);CHECK::R(G)+B(F)
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- B(l);OGATE::QAB(J),XQ(m)
- Refutation
- S(b);
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK::R(G)+B(F)
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- P(j);OGATE,XP(H)::R(G)+B(F),XP(j)
- B(l);OGATE::QAB(J),XQ(m)
- Q(m);SBLOCK::QAB(J),XB(k)
- Q(m);N_GUARD::QAB(J)
- R(a);SBLOCK::R(G)+B(F),XP(e)
- Refutation
- S(b);
- Try
- Q(J);CHECK,XP(f)
- Vars
- K(g);S_FLIGHT::B(A)
- Refutation
- P(h);XQ(J)
- Try
- P(H);XP(j)
- Threat
- R(G)+B(F)
- Vars
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- B(l);OGATE::QAB(J),XQ(m)
- Q(m);SBLOCK::QAB(J),XB(k)
- Q(m);N_GUARD::QAB(J)
- Refutation
- S(b);
- Try
- Actual
- R(C);
- Threat
- DUALS(2)
- Vars
- R(a);CHECK::R(G)+B(F)
- P(c);CHECK,XR(C)::R(G)+B(F)
- P(i);OGATE,P_PINP(D),P_SPINP(i),XB(F)::QAR1(J),XP(i)
- P(j);OGATE,XP(H)::R(G)+B(F),XP(j)
- B(l);OGATE::QAB(J),XQ(m)
- Q(m);SBLOCK::QAB(J),XB(k)
- Q(m);N_GUARD::QAB(J)
- R(a);SBLOCK::R(G)+B(F),XP(e)
- S(b);N_GUARD::R(C),XR(a)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
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